console.log("121212")
let a =100
let b =150
let res = a +b
let fun =()=>{
    console.log("箭头函数")
}
// console.log(window)
fun()
//fs模块
const fs = require("fs");
fs.readFile("C:\\install.log","utf-8",(err,data)=>{
    if(err){
        console.log(err)
        return
    }
})
